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Chinese Journal of Chemical Engineering 2021年第5期34卷 76-82页

作者： Shuai xu Qi Zhu shaojie xu Manjing Yuan xuliang Lin Wenjing Lin Yanlin Qin Yuliang Li School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006China Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region Ministry of EducationSchool of Water and EnvironmentChang'an UniversityXi'an 710064China Guangzhou Key Laboratory of Clean Transportation Energy Chemistry Guangdong University of TechnologyGuangzhou 510006China

In this paper,the aqueous two-phase systems(ATPS)containing n-ethylpyridinium tetrafluoroborate([EPy]BF_(4)),sodium-based salts,and water were studied and the extraction efficiency of 2-chlorophenol was measured to study the ATPS performance in extracting phenolic *** binodal curves of[EPy]BF_(4)+sodium carbonate(Na_(2)CO_(3))ATPS and[EPy]BF_(4)+sodium dihydrogen phosphate(NaH_(2)PO_(4))ATPS have been determined at 308.15 K,318.15 K,and 328.15 K and atmospheric *** getting good correlation with Merchuk equation,the binodal curves together with gravimetric method were used to calculate the tie-lines ***,the reliability of tie-lines data was verified using Othmer-Tobias and Bancroft ***,the salt influence and temperature influence on the phase behavior were discussed and the results show the salt-outing ability of Na_(2)CO_(3) is better than NaH_(2)PO_(4).With the aim of studying the ATPS performance in extracting phenolic compounds,extraction efficiency for 2-chlorophenol at different temperatures were studied and the results show that[EPy]BF_(4)+Na_(2)CO_(3) ATPS is preferred than[EPy]BF_(4)+NaH_(2)PO_(4) ATPS in applications.

关键词： Ionic liquid Aqueous two-phase systems 2-chlorophenol HPLC Extraction

Design and test of the bilateral throwing soil-covering device for straw mulching machine in orchards

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International Journal of Agricultural and Biological Engineering 2023年第1期16卷 162-171页

作者： Xinhua Zhu Xiang Gao xudong Li shaojie xu College of Mechanical and Electronic Engineering Northwest A&F UniversityYangling 712100ShaanxiChina Weichai Lovol Heavy Industry Co. Ltd.Weifang 261200ShandongChina

Aiming to lack the function of soil covering in the developed orchard straw mulching machine(OSM),a kind of bilateral counter-throwing soil-covering device was developed to eliminate the orchard fire risk caused by the straw *** soil-covering device was suspended at the rear of the *** core component was a pair of throwing wheels installed on both sides of a *** motors drove the throwing wheels to take soil on-site and cover the straw *** adjustment range of the space between the throwing wheels on both sides was 1.4-2.1 *** on the analysis of soil-covering quantity,soil-covering width,thickness uniformity of soil layer,and power consumption,the key parameters such as the radius,the number of the vane,and the minimum rotation speed of the throwing wheels were *** was proved that the thickness uniformity of the soil layer by bilateral counter-throwing was better than by unilateral,and bottom throwing was better than top *** blade of the soil cutter consisted of a straight blade and a curved blade,and the sliding-cutting angle was 14°-40°.The field test results showed the soil-covering device had good performance with a width of 1.4-2.2 m,a thickness of the soil-covering layer(TSL)of 23.2-40.7 mm,a standard deviation(SD)of 1.4-2.9 mm,width uniformity of 100%,and leakage rate of *** established model,between the thickness of soil-covering layer and trenching depth,throwing angle,and rotation speed of the throwing wheels,has a determination coefficient of 0.9757 and can be used to guide the operating *** soil cutter reduced the power consumption and impact load of the throwing wheels by 64.77%and 60.88%,*** work provides a type of new equipment for the mechanization technology of straw mulching in arid and semi-arid orchards.

关键词： orchard straw mulching mechanization soil-covering device counter-throwing uniformity

Evaluation and optimization analysis of high-speed rail network structure in Northeast China under the background of northeast revitalization

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Regional Sustainability 2021年第4期2卷 349-362页

作者： xu shaojie WANG Fuyuan WANG Kaiyong Key Laboratory of Regional Sustainable Development Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing100101China University of Chinese Academy of Sciences Beijing100049China

The construction of high-speed rail(HSR)network has promoted the social-economic ties of cities,accelerated the compression of time and space,and changed the pattern of regional *** this paper,with the adoption of the operation frequency data of HSR from 12306 website,and based on the HSR connection strength model and social network analysis model,as well as according to the HSR connection strength,HSR network density,centrality,agglomeration subgroup,and other indicators,we analyzed the characteristics of HSR network structure in Northeast *** show that the number of HSR cities in Northeast China is small,cities in HSR network generally exhibit weak connectivity,and the existence of HSR network marginalizes cities such as Ulanhot,Baicheng,and Songyuan,which significantly reduce the overall network connectivity of Northeast *** overall centrality of HSR network in Northeast China is characterized by“one axis,four edges”;specifically,the one axis is located in Harbin-Dalian transportation line and the four edges are located on both sides of the main axis of Harbin-Dalian transportation *** agglomeration subgroups(four double city subgroups and four multi city subgroups)have formed in Northeast *** core status of Shenyang in HSR network is improved significantly,and“one axis and two wings”HSR network in Liaoning Province is improved *** the gradual expansion of Chaoyang-Fuxin,Dandong-Benxi,and Jilin-Yanji branch networks,the“point axis”HSR network mode in Northeast China has gradually developed and *** the future,it is recommended to rely on eight agglomerating subgroups to encrypt HSR network structure,create secondary node central cities,and gradually build a new pattern of opening up in Northeast China.

关键词： Social network analysis High-speed rail network structure Operation frequency Intercity connection intensity Network density analysis Northeast China

Transition of Streamer, Corona and Glow Discharges in Needle-to-plane Dielectric Barrier Discharge at Atmospheric Pressure Air

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高电压技术 2013年第10期39卷 2553-2559页

作者： YU Zhe YANG Haidong DU Huan YAO Jing xu shaojie ZHANG Zhitao Institute of Marine Engineering Dalian Maritime University Dalian 116026 China Department of Physics Dalian Maritime University Dalian 116026 China

To discuss the modes of dielectric barrier discharge(DBD) between needle-to-plane electrodes in air,DBD is generated and observed on a needle-to-plane device at atmospheric pressure *** images of the DBD are taken by using a charge couple device(CCD) cinema with a macro lens,while the electrical and photo-electricity waveforms of the DBD are *** current waveforms show that under an applied voltage of 3 kV,there are numerous short current pulses in both positive and negative half-periods of ***,under 6 kV,there are still the numerous short current pulses in the positive half-periods,but only one wide current pulse in each negative *** difference is also found in the photoelectric *** streamer,corona and glow discharges are observed from the images of the discharges at different applied *** structure of glow discharge in the negative period is exactly the same as that of the low pressure glow ***,in the positive period of discharge there is always a *** the negative period of discharge,while the applied voltage increases,the transition from corona to glow discharge is *** progress of a transition between streamer and glow discharge at 6 kV during one period is *** glow discharge appearance is determined by two factors: the discharge current is limited to a certain extent by the dielectric layer; the charges deposited on the dielectric layer during the last half period enhance the intensity of the electric *** an insufficient applied voltage,the cathode drop leads to no glow discharge,but Trichel pulses.

关键词：介质阻挡放电辉光放电平面电极流光空气电晕电荷耦合器件电流脉冲

Prognostic role of plasma levels ofγ-glutamyl transpeptidase in patients with advanced gastric cancer treated with anti-PD-1 immunotherapy

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Oncology and Translational Medicine 2022年第3期8卷 109-114页

作者： shaojie xu Yiming Feng Xingyin Li Zaozao Huang Hewei Li Ganxin Wang First Clinical College Huazhong University of Science and TechnologyWuhan 430022China Department of Radiology Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China Yangchunhu Community Hospital Liyuan HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430077China Department of Orthopedics Liyuan HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430077China Cancer Center Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022China

Objective Antibodies targeting programmed cell death protein 1(PD-1)have become the mainstay of treatment for chemotherapy-refractory gastric cancer,characterized by high levels of programmed cell death ligand-1(PDL-1)***,the routine clinical implementation of PDL-1 testing is currently limited by the lack of robust detection *** this regard,the role of plasmaγ-glutamyl transpeptidase(GGT),an N-terminal nucleophilic hydrolase,as an independent predictor of the efficacy of anti-PD-1 therapy remains *** this study,we aimed to assessed the prognostic role of changes in plasma GGT levels(6 weeks ***)in patients with advanced gastric cancer treated with anti-PD-1 *** We retrospectively analyzed data from 57 patients with gastric cancer treated with anti-PD-1 antibodies(camrelizumab,sintilimab,nivolumab,tislelizumab,and toripalimab)at the Union Hospital,Tongji Medical College,Huazhong University of Science and Technology,Wuhan,China,from July 2018 to February *** We found that after 6 weeks of treatment,there were significant differences between responders and non-responders with respect to plasma GGT levels(P<0.001).Multivariate logistic regression analysis revealed that the continuous value of the 6-week difference in GGT levels(OR=1.437,95%CI=1.116-1.849,P=0.005)and 6-week difference in GGT≥0 or<0(OR=53.675,95%CI=6.379-451.669,P<0.001)were independent predictors of disease *** analysis indicated that a reduction in plasma GGT6 levels during treatment was significantly associated with a favorable progression-free survival(PFS)and overall survival(P<0.001).Consistently,univariate and multivariate Cox regression analyses revealed that a reduction in plasma GGT6 levels during treatment was an independent predictor of PFS(HR=1.033,95%CI=1.013-1.053,P=0.001).Conclusion Alterations in plasma GGT levels during treatment can be used as a predictor of disease progression and survival in patients with ad

关键词： gastric cancer programmed cell death receptor 1 γ-glutamyl transpeptidase(GGT) prognosis

中国地级及以上城市行政中心迁移的时空格局与驱动机理

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地理学报 2024年第10期79卷 2511-2528页

作者：徐少杰王开泳王甫园赵彪中国科学院地理科学与资源研究所中国科学院区域可持续发展分析与模拟重点实验室北京100101 中国科学院大学北京100049 中国社会科学院中国边疆研究所北京100101

城市行政中心迁移对于优化城市空间结构,推动国家治理体系与治理能力现代化具有重要意义,深入分析中国城市行政中心迁移的时空格局、驱动机理和发展趋势既是支撑国家治理现代化的现实需要,也是推进行政中心迁移规范化、科学化的前提。... 详细信息

城市行政中心迁移对于优化城市空间结构,推动国家治理体系与治理能力现代化具有重要意义,深入分析中国城市行政中心迁移的时空格局、驱动机理和发展趋势既是支撑国家治理现代化的现实需要,也是推进行政中心迁移规范化、科学化的前提。基于空间分析方法,对中国1978年改革开放以来地级及以上城市行政中心迁移进行综合分析。研究发现:①自1978年改革开放以来,中国共有81起行政中心迁移案例,2003—2007年是迁移高峰期,并存在显著的区域差异,迁移多是短距离迁移,并以推动城市新区建设为主要目的,呈现出与地理中心相分离的特点。②城市行政中心迁移是一个涉及多种因素相互作用的复杂过程,这一过程涉及国家政策、政府引导、权力分配、资源重组以及规划调整等因素的多维博弈,国家政策的调控和城市政府的引导是其中的关键。③在国家严控行政区划调整的背景下,城市行政中心迁移将继续强化传统驱动因素,同时适应社会经济和技术变革,呈现生态治理、交通驱动及创新产业发展等新导向。应在保持行政中心基本稳定的前提下,审慎考虑迁移的必要性,做好行政中心迁移的顶层设计,规范审批程序和分析论证环节,以推动城市全面发展。本文能为科学认识城市行政中心迁移的规律和内在机制提供参考。

关键词：行政区划行政中心迁移时空格局驱动机理发展趋势中国

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国内外行政中心迁移的研究进展与展望

地理科学进展 2024年第10期43卷 2090-2106页

作者：徐少杰王开泳王甫园中国科学院地理科学与资源研究所中国科学院区域可持续发展分析与模拟重点实验室北京100101 中国科学院大学资源与环境学院北京100049

行政中心迁移研究融汇了地理、历史、经济、政治、环境等众多学科视角,探究其历史发展脉络与未来演进趋势,对于提升行政区划设置的科学性、规范性、有效性,推动国家治理体系和治理能力现代化具有重要意义。论文通过文献梳理和文献计量,... 详细信息

行政中心迁移研究融汇了地理、历史、经济、政治、环境等众多学科视角,探究其历史发展脉络与未来演进趋势,对于提升行政区划设置的科学性、规范性、有效性,推动国家治理体系和治理能力现代化具有重要意义。论文通过文献梳理和文献计量,系统分析了国内外的相关文献,阐明了行政中心迁移的概念属性、研究主题演进、主要研究成果及未来发展趋势。研究发现,行政中心迁移的研究服务于国家战略发展,其研究成果与国家政策形成存在互动关系,有效促进了行政区划研究领域的深化与拓展。此外,行政中心迁移研究领域展现出的历史连续性及跨学科特质,为研究提供了丰富的视角与方法。鉴于国际与国内经济社会发展阶段及行政体制的差异,国际经验对我国而言,意味着需要依据中国特定的国情,运用辩证方法,开拓具有中国特色的研究路径。在推动国家治理体系及治理能力现代化的进程中,应加强对行政中心迁移的效应评估和机理分析,注重对迁移方案的科学评估,并利用跨学科研究的优势,不断深化理论与方法论的探索,通过有效的行政区划手段促进区域可持续发展,提升国家空间治理效能。

关键词：行政区划行政中心迁移首都迁移区域效应国际借鉴

The Transition of Streamer, Corona and Glow Discharge in the Needle-to-plane Dielectric Barrier Discharge in Atmospheric Air

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The Transition of Streamer, Corona and Glow Discharge in the...

制度距离、相邻效应与双边贸易——基于“一带一路”国家空间面板模型的实证分析

中国物理学会第十八届全国静电学术会议

作者： YU Zhe YANG Haidong DU Huan YAO Jing xu shaojie ZHANG Zhitao Institute of Marine Engineering Dalian Maritime University Department of Physics Dalian Maritime University

The purpose of this study was to discuss the modes in the needle-to-plane dielectric barrier discharge in air. The needle-to-plane dielectric barrier discharge device in atmospheric pressure air is studied by taking the fast images of the discharge using the charge couple device cinema with a macro lens, measuring the electrical and the photo-electricity waveforms. The experiment results show that when the applied voltage is 3k V, both positive and negative half-period of total current consist numerous short current pulse. With the applied voltage increases to 6 k V, the positive half-period current also consist numerous short current pulse, but the negative half-period current consist one wide current pulse. The photoelectric signal show the same characters. The streamer, corona and glow discharge is observed from the images of discharge with the different applied voltage. The structure of glow discharge in the negative period is exactly same as that of the low pressure glow discharge. According to the results, it is concluded that in the positive period of discharge, it is always streamer with increasing of applied voltage, and the difference is the intensity of the discharge. In the negative period of discharge, the transition from corona to glow discharge is generated with increasing of applied voltage. The progress of the transition of streamer and glow discharge alternately with the applied voltage 6 k V in one period was analyzed. Two important factors why the glow discharge is generated is that, firstly, the discharge current is limited, not too large, because of the dielectric layer. Secondly, the deposit charges on the dielectric layer last half period enhance the intensity of electric field. If the applied voltage is not strong enough, the cathode fall cannot lead to glow discharge, but Trichel pulse.

关键词： dielectric barrier discharge streamer glow discharge corona Trichel pulse atmospheric pressure

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财经研究 2017年第1期43卷 75-85页

作者：许家云周绍杰胡鞍钢清华大学公共管理学院北京100084 清华大学国情研究院北京100084

制度在双边贸易中具有举足轻重的作用。文章首次将相邻效应引入传统的制度与贸易关系的分析框架,运用空间面板模型深入考察了制度距离、相邻效应对中国与"一带一路"国家双边贸易的影响。结果表明,中国与"一带一路"沿线国家之间在文化、... 详细信息

制度在双边贸易中具有举足轻重的作用。文章首次将相邻效应引入传统的制度与贸易关系的分析框架,运用空间面板模型深入考察了制度距离、相邻效应对中国与"一带一路"国家双边贸易的影响。结果表明,中国与"一带一路"沿线国家之间在文化、法律、宏观经济制度以及微观经济制度方面的差异显著抑制了双边进出口贸易的发展,并且这种抑制作用在长期更为显著。进一步引入相邻效应的分析表明,中国与"一带一路"沿线国家之间的双边贸易受到中国与沿线国家邻国之间贸易的制约,即相邻效应表现为竞争关系,并且无论是针对进口贸易还是出口贸易而言,中国与沿线国家之间的制度距离均强化了相邻效应的"竞争"作用,但上述作用在不同地区具有显著差异。因此,在推进"一带一路"战略时,中国需要考虑制定相关的配套政策来平衡中国与"一带一路"国家,特别是与这些两两相邻国家之间的双边贸易利益,以促进中国与各国双边贸易关系的良性发展。

关键词：制度距离双边贸易相邻效应空间模型

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火箭弹气动力工程算法计算模型研究

弹箭与制导学报 2012年第3期32卷 167-170页

作者：许邵杰陈雄胡少青南京理工大学机械工程学院南京210094

针对传统火箭弹气动力工程算法中大量的查阅图表进行手工插值带来的不便和误差,文中利用Auto-CAD软件,通过AutoLISP语言编写程序对火箭弹空气动力图表数据进行选取,并转换为数据文本文件,再利用BASIC语言编写插值程序对数据文本文件进... 详细信息

针对传统火箭弹气动力工程算法中大量的查阅图表进行手工插值带来的不便和误差,文中利用Auto-CAD软件,通过AutoLISP语言编写程序对火箭弹空气动力图表数据进行选取,并转换为数据文本文件,再利用BASIC语言编写插值程序对数据文本文件进行插值处理,进而完成火箭弹空气动力模型的计算。经过实际计算验证,计算速度快,精度高,结果可靠。

关键词：火箭弹气动力曲线拟合插值